Try these steps to correctly Re-install the Alienware Command Center  .

You need to have Microsoft .net Framework 4.0 installed in your computer.

I had reinstall the alienware command center and microsoft.net fremework 4.0 but problem still the same

What is the error message you're getting?

There was an error while AlienFX Controller was communicating with the computer. This might have been caused due to a problem with the hardware or the software.Try these solutions to correct the issue, in the following order:

 - Try to enable AlienFX Controller again. Right-click on the AlienFX icon in the Windows notification area and select 'Enable Alienware AlienFX'.
 - Shut down your computer and power it back on.

If neither of these solutions works, please contact Alienware technical support.
This error may also be caused if Alienware AlienFX software is installed on a computer without the proper hardware support for Alienware AlienFX

this what I get please help me

When did this start?

3 days ago

Have you Re installed Windows 7? If you haven't you can always roll back to factory settings.

Tried also

yes I had tried

Try to do a clean boot and see if the issue persists.